Counties › Texas › Harris County, TX
The Harris County Engineer's 2026 No Zoning Letter says the county has no zoning regulation in the unincorporated area, but it does regulate floodplain management, on-site sewage facilities, driveways and signs. Below is what the county and state sources say, with links. Confirm each point with Harris County before you buy or build.
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The Harris County Engineer's No Zoning Letter, dated January 1, 2026, says there is no zoning regulation promulgated or administered by Harris County in the unincorporated area. The same letter says the county does administer regulations on floodplain management, on-site sewage facilities, driveways and signs.
Cities can still have a say outside their limits. The County Engineer's platting page says several cities require their own review and approval of land subdivision within their extraterritorial jurisdictions (ETJ) in unincorporated Harris County, and that in certain areas with no ETJ the county's platting group alone reviews and approves subdivisions. Ask the county which city, if any, reviews plats where your land is.
The County Engineer's permit page for residential construction and on-site sewage (septic) systems covers residential development on existing lots, including on-site sewerage systems and new homes. Its checklist includes a site evaluation report by a Professional Engineer or Registered Site Evaluator, a septic design site plan and technical report, an affidavit recorded with the Harris County Clerk, and a maintenance contract with a licensed maintenance provider. The page lists a processing time of 30 business days.
The Texas Commission on Environmental Quality (TCEQ) says a permit is required to construct, install, alter, extend or repair an on-site sewage facility, that local permitting programs can be more stringent than the state minimums, and that the state rules are in 30 TAC Chapter 285. Ask the county's wastewater permitting staff which rules apply to your lot.
The County Engineer's floodplain management page says a Floodplain Development Permit is required for all work in the floodplain, and that grading, filling, paving and construction on property in the Special Flood Hazard Area must follow the county's Floodplain Management Regulations. For a structure in or next to that area it asks for two elevation certificates, one before the slab is poured and one for the finished floor after construction; it says the post-construction certificate must be certified by a Texas Registered Professional Surveyor, Engineer or Architect.
The county's permits FAQ says a permit is needed for all development within Harris County, that fill is not allowed in a floodway, and that a project in the 100-year floodplain or floodway needs a Texas-licensed architect or engineer.
The No Zoning Letter says single-family homes and duplexes permitted in unincorporated Harris County after September 1, 2009 must follow the county's inspection notification process under Subchapter F of Chapter 233 of the Texas Local Government Code: the builder tells the county the date of certain inspections and whether they showed compliance with the International Residential Code version used. The letter says no certificate of occupancy is issued for these homes.
That state law (Local Government Code section 233.154) calls for at least three inspections of a new home on a vacant lot, at the foundation, framing and mechanical, and completion stages, by an inspector such as a licensed engineer, registered architect or inspector licensed by the Texas Real Estate Commission. Section 233.151 says the rule does not cover a home built under Chapter 1201 of the Occupations Code (manufactured housing) or a modular home built under Chapter 1202.
The letter says multi-family buildings of four or more units, and commercial and public buildings, fall under the Harris County Fire Code. The county's permits FAQ says a driveway within county right-of-way requires a permit.
The Texas Department of Housing and Community Affairs (TDHCA) Manufactured Housing Division says only a licensed installer may install, relevel, or modify any component of a manufactured home's foundation. The state Manufactured Housing Rules (section 80.21) say new homes must be installed by a licensed installer following the manufacturer's DAPIA-approved instructions, and used homes by a licensed installer to instructions for the wind zone where the home goes.
Occupations Code Chapter 1201, as published by TDHCA, says installed manufactured housing must meet the department's standards (section 1201.255), and that except as the department approves, a local government may not require a permit, fee, bond or insurance for transport and installation by a licensed retailer or installer (section 1201.008).
The TDHCA FAQ says a manufactured home is personal property by default unless the owner elects real property status on the Statement of Ownership application, and says an owner who converts the home to real property should contact the county clerk about recording procedures, requirements and fees.
No county zoning does not remove private restrictions recorded against a lot. The Harris County Clerk's Real Property Department records documents about real property in Harris County and offers an online records search. Ask the Clerk's office how to find any deed restrictions recorded for your lot.
State law (Local Government Code Chapter 212, Subchapter F) lets a city with a population of 1.5 million or more, or a city without zoning ordinances, that passes an enforcing ordinance sue to enforce restrictions in a properly recorded plat or other instrument affecting a subdivision inside the city's boundaries. That law covers land inside a city, not unincorporated land.
Harris County Office of the County Engineer, 1111 Fannin St. 11th fl., Houston, TX 77002: (713) 274-3600 (No Zoning Letter). Permits main phone: (713) 274-3900; inspection questions: 713-274-3800; platting questions: 713-274-3932.
Harris County Clerk, Real Property Department, 201 Caroline, Suite 320, Houston, TX 77002: (713) 274-8680.
TDHCA, Statement of Ownership forms and corrections: 1-800-500-7074.
LandCheck took these facts from the county sources listed under each heading. General information, not legal advice: the county, the health department and a licensed installer have the final word, so confirm anything that matters with them before you buy. LandCheck is free with no account; terms, privacy and refunds.